Telegraphic-code condenser.



M. B. DIGKIE. TELEGRAPHIG CODE CONDENSER. APPLICATION FILED FEB. 21,1908.

901,957. Patented Oct. 27, 1908.

I To allwiiom it my concern:

.Be tknown that I, MATTHEW 13am 1 Tsar; "'0, 901,957. Speeif cation ofpp'iicaticn filed Feb Drcmn, mercantile clerk, a subject of the King ofGreat Britain, residing at Nobel House, 195 West George street, Glasgowscotland, haveinvented new and useful Eniprovements in Telegraphic-CodeCondeesers .oI which the following is a specification.

r 1 The object of this invention is to pro ide an improved telegraphiccode condenser by means of which a very large number say two hundredthousand. pronounceable five letter words corresponding to the codenumbers from G to 199%9 may be employed it being possible to determinethe word corresponding to any given number when condensing or. thenumber corresponoing to any received word when deeodin' with the erependiture of very little trouble and-time The condenser is made on theprinciple of a slide rule and consists of three concentric circularscales.

As the apparatus will be more readily, understood by reference to theaccompanyin drawing it will be described at once with re erence thereto.

Figure l of the drawing is a plan and Fig 2 a cross'section of theapparatus.

a is the largest scale Wl lao .1 may be Ci"L"WEl o r mounted upon aboard or card 3) oi any convenient size and shape; the scale is di-'vided into 109 compartments, numbered consecutively from fill to 990Each com; nient contains besides the two digits or number two letterscorresponding to the nnniben- This scale is also divided into divisions,corresponding to the numbers from 00 to 09 (that is from 0 to 9} from 16to 19, and so on, as is shown in the drawing and what may be called thesyllables in the first division are formed of A followed by theconsonants B D G K M P P T W Y (which may be called the first series) inturn. The syllables in the second division are formed of E followed theconson nts C F H L N Q; E} V X Z (which may be or the second series) inturn. The syllables i the third .tlivision corresponding to *o 29, areformed of l followed. by the firt of the live vowels in their properorder as e Patent. EEatented Get. 27, 1908.

cceded by the second first, secsecond series in order. I 1 the scale aan intermediate .o divided into 100 compartments as shown but into fivedivisions of 20 (30111 partznents (ch. Each compartment contains as in cor" scale a a number consisting of two dig-is the numbers ranging am0tin consecutive order) and a lable or two letters. in thiscase all thecommence with a vowel tl ose in div" :ion corresponding to the nunn ersCO toll aegin with A those in the -secs. division corresponding to 20 towith J and so on the consonants of the two series iollowing in eachdivision in alphabetical Just within the scale 0 is the innermostscale dwhich essentially consists of only twenty compartments numbered from Oto 19 and lettered with the whole twenty consonants as above inalphabetical order these compartments should of course be of the samecircular measure as those in scales (5 and c, butin order to savetrouble in use, is found convenient to repeat the. series of nu nbersand consonants five times thus filling e tire circumference of the scale(5. The two scales 0 and (Z are suitably mounted upon a pivot 0 so thatthey can be readily turned ii ependently of one another relative toscale a The method of use will be best explained by an illustrationIn,trans1nitting-suppose it is desired to send two sentences 01 words ofwhich the code numbers are 938% and l3260l-lirst find the number 9% inscale a, then turn scale 0 till the number decodin received message forine we must divide it into (which will found in l scale 0 O comes inline and then turn scale one/oi the Zs upon it comes in line this givesthe, number 198473. Similarly it) in Fupye gives the number 39069. Themeaning of these two numbers can then be found in the code bookin theusual manner.

It will be seen that by the use of this condenser any two of the naturalnumbers from into compartments with the compartments in one scaleradially in line with the compartments in another scale, eachcompartment in each scale containing a number and a letter footing onradial lines wherebythe number in one compartment of one scale can bebrought radially in line with the number like manner the letter in onescale can be brought radially 'in line with the letter in another scale.

2. A telegraphic code, condenser consist- ?5 ing of a circular scalehaving a number f compartment in another scale and inv having a numberof compartments each containing a number of two digits and a syllableformed of a vowel and a consonant and an inner scale also having anumber of 00mpartments each cont: .ning a number and a consonant.

3. A telegraphic code condenser consisting of a circular scale withnumerous oompartments each containing a number of two digits and asyllable of two letters, the compartments being divided into divisionsaccording to the'vawels employed inthem an in terniediate scale alsodivided into the same number ofcompartments each containing a number oftwo digits and a syllableof two letters and an inner scale with numerouscompartments substantially as described each 45 containing a numberan... a letter.

MATTHEW BAIN REYCKIE. Witnesses J urns M Ui-YRAY AITIIEN, Gnonon McNAB.

